Hydroformylation is one of the most important reactions for the production of aldehydes and alcohols,and the im-provement of hydroformylation process of high olefins has been one of the difficulties and hotspots in the research.A hydroformylation process of C10 olefin was explored.A mixture of triphenylphosphine and tris（2-tert-butyl-4-methoxyphenyl） phosphite was used as the ligand to react with dicarbonylacetylacetonato rhodium（Ⅰ） to form the in-situ synthesis catalyst system for hydroformylation of 1-decene.The effects of reaction temperature,pressure,Rh concentration,phosphine/Rh ratio and inorganic salt additive on the reaction were investigated.The results showed that under the conditions of n（Ph₃P）/n（L_A）=10,Rh concentration of 280 mg/kg,1-decene of 0.3 g/mL（toluene）,n（P）/n（Rh）=45,reaction temperature of 90 ℃,pressure at 2.0 MPa,n（CO）/n（H₂）=1,reaction time of 4 h,the conversion of 1-decene was 98.1% and the yield of aldehydes was 93.2% with N/I of 7.5.It is also found that when the product is separated from the catalyst by vacuum distillation,the addition of inorganic salt can improve the stability of the catalyst and reduce the loss of rhodium.